using System;

using System.Collections.Generic;

using System.Linq;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

​

​

​

public class Program

{

    public static void Main()

    {

        string json = @"

        {

          ""WikiId"": ""83981284-0AD3-4420-90AB-15E3BF6BD7B7"",

          ""WikiText"": ""Text"",

          ""Title"": ""Title"",

          ""CreatedOn"": ""2017-08-07T09:16:06.08"",

          ""Tags"": [{}]

        }";

​

        Wiki wiki = JsonConvert.DeserializeObject<Wiki>(json);

​

        Console.WriteLine("WikiText: " + wiki.WikiText);

        Console.WriteLine("Tags: " + wiki.Tags.Count());

    }

}

​

class IgnoreEmptyArrayItemsConverter : JsonConverter

{

    public override bool CanConvert(Type objectType)

    {

        bool result = objectType.IsAssignableFrom(typeof(List<>));

        return result;

    }

​

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

    {

        var tokenIndexesToRemove = new List<int>();

​

        var array = JArray.Load(reader);

​

        for (int i = 0; i < array.Count; i++)

        {

            var obj = array[i];

            if (!obj.HasValues)

                tokenIndexesToRemove.Add(i);

        }

​

        foreach (int index in tokenIndexesToRemove)

            array.RemoveAt(index);

​

        var result = array.ToObject(objectType, serializer);

        return result;

    }

​

    public override bool CanWrite

    {

        get { return false; }

    }

​

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

    {

        throw new NotImplementedException();

    }

}

​

public class Tag

{

    public Guid? TagId { get; set; }

    public string TagText { get; set; }

    public DateTime CreatedOn { get; set; }

}

​

public class Wiki

{

    public Guid? WikiId { get; set; }

    public string WikiText { get; set; }

    public string Title { get; set; }

    public DateTime CreatedOn { get; set; }

​

    [JsonConverter(typeof(IgnoreEmptyArrayItemsConverter))]

    public HashSet<Tag> Tags { get; set; }

}

​